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References: <20220706174253.4175492-1-yury.norov@gmail.com>
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From:   Yury Norov <yury.norov@gmail.com>
Date:   Tue, 12 Jul 2022 09:28:21 -0700
Message-ID: <CAAH8bW-OcdzetthsBanbkObVQxF1J6CiyBBnab=VXd2wcj517Q@mail.gmail.com>
Subject: Re: [PATCH v2 00/10] lib: cleanup bitmap-related headers
To:     linux-kernel@vger.kernel.org,
        Andrew Morton <akpm@linux-foundation.org>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        David Howells <dhowells@redhat.com>,
        Ingo Molnar <mingo@kernel.org>,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        Jonathan Corbet <corbet@lwn.net>,
        "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
        Matthew Wilcox <willy@infradead.org>,
        NeilBrown <neilb@suse.de>,
        Rasmus Villemoes <linux@rasmusvillemoes.dk>,
        Russell King <linux@armlinux.org.uk>,
        Vlastimil Babka <vbabka@suse.cz>,
        William Kucharski <william.kucharski@oracle.com>,
        linux-doc@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-mm@kvack.org
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On Wed, Jul 6, 2022 at 10:42 AM Yury Norov <yury.norov@gmail.com> wrote:
>
> This series unifies declarations of bitmap-related functions and aligns
> return types with values that actually returned. Also, it moves one-liner
> wrappers around cpumask functions into headers, so that compiler has a
> chance to optimize better.
>
> With this series, GCC 11.2 for ARM64 with kernel v5.19-rc4:
> add/remove: 15/7 grow/shrink: 461/164 up/down: 14844/-4580 (10264)
>
> This +10K didn't surprise me because  modern compilers are more aggressive
> in inlining, loop unrolling, and other techniques that increase size of
> the image.
>
> v1: https://lore.kernel.org/linux-mm/YsAzU3g2QpgmIGre@smile.fi.intel.com/T/
> v2: - Align whitespaces in headers;
>     - Make bitmap_weight() unsigned long consistently;
>     - Pick 2 patches from Ingo's sched/headers series [1] that split
>       linux/gfp.h, and drop my similar patch for it.

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